272 CLXXill. eiiAMlNfi^. (J. S. Hooket.) [Trisiachya. 



acuminate, glabrous; III lanceolate, acuminate, membranous, awn 0; 

 IV deeply 2-fid -with a long twisted awn in the sinus (copiously bearded 

 above the middle in the Indian sp.) ; palea narrow, acute. Lodicules 

 minute, cuneate, fleshy. Anthers long. Styles long, slender. Grain 

 narrow, free. — Species 8, chiefly tropical. 



T. barbata, Nees ex Steud. 8yn. Oram. 238 ; Boiss. Fl. Orient, v. 

 552 ; DutMe Gras.1. ]V. W. Ind. 32. T. Stocksii, Boiss. I. c. ; Munro in 

 Aitohis. Cat. Punjab. PI. 168; .DutHe Fodd. Grass. N. Ind. 51. Loudetia 

 barbata, A. Brawn in Flora, xxiv. (1841) ii. 714. Sorghum barbatum, 

 Soehsi. et Steud. PL Arab. Exaicc. n. 788. 



SciND; Stocks. — DiSTKiB. Arabia, Nubia. 



Stem 6-18 in. branched and woody below, geniculately ascending, base clothed 

 with tomentose sheaths, slender and wiry above ; nodes bearded. Leaves 1-3 in., 

 lanceolate from a rounded base, finely acuminate, pungent, rigid, glaucous, many., 

 nerved, margin thickened subserrulate ; sheaths smooch ; ligule 0. Panicle sparingly 

 branched, 1-2 in. long and broad ; branches solitary and 2-nate, capillary, flexuons, 

 subscaberulons, branchlets 1-3-fld. Spikelets i in., pale yellowish; gl. I and II 

 3-nerved, II i-i longer than I ; III much longer than I, interruptedly 7-nerved, 

 and its callus glabrous; IV with a very short broad lamina, margins involute, lateral 

 lobes lanceolate, aristate, 3-nerved, rather longer than the hairs ; median awn about 

 twice as long as the gl. — I find no character fisr T. Stocksii. 



80. AIB.A, Linn. 



Annual or perennial grasses. Leaves narrow. Spikelets 2-fld. (both 

 fl. perfect) panicled, branches capillary ; raohilla jointed at the base, not 

 produced beyond gl. IV. Glumes 4, hyaline ; I and II subequal, 3-nerved, 

 acute, empty, persistent ; III and IV smaller, often 2-toothed ; awn dorsal, 

 capillary, usually twisted below ; callus naked ; palea hyaline, 2-nerved. 

 Lodicules 2. Anthers small. Grain minute, free or adhering to the 

 hyaline gl. — Species 4 or 5, B urope and temp. Asia. 



A. caryopbyllea, Linn, Sp. Fl. 66 ; annual, very slender, leaves 

 setaceous, ligule lanceolate, panicle broad erect capillary trichotomously 

 branched, spikelets long-pedicelled. Kunth Enum. PI. i. 289, Svppl. 241, 

 t. 18, f. 2 ; Fl. Dan. t. 382 ; Lamk. Fncycl. t. 44 ; E^ost Gram,. Austr. ii. 

 33, t. 44; Svensh. Bot. t. 508; Beichb. Ic. Fl. Germ. t. 94; Engl. Bat. t. 

 812 ; Knapp Gram. Britt. t. 35; T. Nees Gen. Fl. Germ. Monocot. i. n. 44; 

 Steud. Syn. Gram. 22i ; Ledeb. Fl. JSoss. iv. 424; Boiss. Fl. Orient, v. 

 529 ; Buthie Grass. JSf. W. Ind. 31. A. canescens. Host I. c. iv. 21, t. 36. 

 A. Cupaniana, Ouss Fl. Sic. Syn. i. 145. A. curta, patulipes & plesiantha, 

 Jord. ex Bar. Fl. Gentr. Fr. Ed. III. ii. 701. A. divaricata, Powr. in 

 Mem. Acad. Paul. iii. (1788) 307. A. multiculmis, (multicanlis, Munth), 

 Ihimort. Agrost. Tent. 121, t. 7, f. 28. A. pnrpureo-argentea, Gilib. Exercit. 

 ii. 526. A. rigida, Bulac Fl. Haute-Pyren. 82. A. Todari, Tenore ex 

 Tod. Ind. Sem. Hort. Panorm. 1859 ; Linnsea, xxx. (1869) 78S. A. triaris- 

 tata, Clarke Trav. ii. 452. Avena caryophyllea, Weber in Wigg. Prim. Fl. 

 Sols. 10. Fussia caryophylla, Schur Enum. PI. Transs. 754. 



N.W. Himalaya ; Kashmir, Vicary, Stewart, Kohat, and Lahul, Bay, &e. 

 Wbstebn Tibet, alt. 12,000 ft., StoUeha. — Disteib. N. Africa, temp. Asia (introd. 

 elsewhere). 



Stems 2-10 in., tufted, filiform, scabrid above. Leaves obtuse and sheaths 



